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United States Patent | 6,173,131 |
Kitamura ,   et al. | January 9, 2001 |
An image heating apparatus includes a heating member for heating an image on a recording material, a first temperature detecting element for detecting a first temperature of the heating member, a second temperature detecting element for detecting the second temperature of the heating member, wherein a thermal property of the second temperature detecting element differs from a thermal property of the first temperature detecting element, and a power supply controller for controlling the power supply to the heating member by utilizing the first temperature detecting element and the second temperature detecting element.
Inventors: | Kitamura; Shingo (Odawara, JP); Watanabe; Nobuyuki (Yokohama, JP); Noguchi; Junichi (Yokohama, JP) |
Assignee: | Canon Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 993157 |
Filed: | December 18, 1997 |
Dec 19, 1996[JP] | 8-354562 |
Current U.S. Class: | 399/33; 374/153; 374/183; 399/69 |
Intern'l Class: | G03G 015/20 |
Field of Search: | 399/33,69,70,328,330,335 219/216,469,470,471 323/369 374/153,183,185 |
3316765 | May., 1967 | Trolander et al. | 374/172. |
3652921 | Mar., 1972 | Ny | 323/369. |
4001545 | Jan., 1977 | Wada et al. | 219/216. |
4367037 | Jan., 1983 | Nishikawa | 399/69. |
5019693 | May., 1991 | Tamary | 399/33. |
5325164 | Jun., 1994 | Tai et al. | 219/216. |
5572306 | Nov., 1996 | Goto et al. | 99/69. |
5633704 | May., 1997 | Suzuki et al. | 399/69. |
5663899 | Sep., 1997 | Zvonar et al. | 374/179. |
5735604 | Apr., 1998 | Ewals et al. | 399/69. |
5862436 | Jan., 1999 | Ishizawa et al. | 399/69. |